selftests/powerpc: Remove duplicated include from tm-poison.c

Remove duplicated include.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210326064808.3262568-1-zhengyongjun3@huawei.com

tools/testing/selftests/powerpc/tm/tm-poison.c

@@ -20,7 +20,6 @@
 #include <sched.h>
 #include <sys/types.h>
 #include <signal.h>
-#include <inttypes.h>
 
 #include "tm.h"